SN74HCT573DWIn StockTexas Instruments
The SN74HCT573DW is an 8-bit transparent D-type latch with 3-state outputs, operating at 4.5–5.5V supply voltage. It features active-low output enable control and supports 6mA output sink current in a 20-pin SOIC package. From $0.25 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74HCT573DW Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2510(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit transparent D-type latch with 3-state bus interface outputs for high-impedance isolation
- HCT logic family with 4.5V–5.5V operating range and TTL-compatible input thresholds
- Active-low output enable (OE) for easy bus sharing and multiplexing
- 6mA output sink current with 50pF load capacitance, suitable for driving bus lines
- Available in 20-pin SOIC package for space-efficient PCB designs
Applications
The SN74HCT573DW is widely used in address/data bus buffering for microprocessor and microcontroller systems, where its 3-state outputs allow multiple devices to share a common bus. It is also employed in register files, memory interface circuits, and I/O port expansion designs requiring HCT-level voltage compatibility. Its transparent latch function makes it ideal for data pipeline stages and level-translating applications in mixed 3.3V/5V logic systems.
Specifications
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | HCT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.006A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 44ns |
| Propagation Delay (tpd) | 65ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HCT573DW:
Frequently Asked Questions
What is the operating voltage and logic family of the SN74HCT573DW?
The SN74HCT573DW belongs to the HCT logic family and operates from a 4.5V to 5.5V supply voltage. It features TTL-compatible input thresholds, making it suitable for interfacing between TTL and CMOS logic levels in 5V systems.
How does the output enable pin work on the SN74HCT573DW?
The SN74HCT573DW uses an active-low output enable (OE) control pin. When OE is held low, all 8 outputs reflect the stored latch state. When OE is driven high, all outputs enter a high-impedance (3-state) mode, allowing multiple devices to share the same bus without contention.
What are common applications for the SN74HCT573DW?
Common applications include address and data bus buffering in microprocessor systems, memory interface circuits, I/O port expansion, and data pipeline stages. Its 8-bit transparent latch with 3-state outputs makes it well suited for any design requiring controlled bus sharing.
What package is the SN74HCT573DW available in and what is a compatible replacement?
The SN74HCT573DW is available in a 20-pin SOIC (Small Outline IC) package. Compatible alternatives include the SN74HCT573N (PDIP-20) and the SN74HCT573PW (TSSOP-20). All variants share the same pinout and electrical characteristics.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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